EP1716818A1 - Limes et alésoirs endodontiques - Google Patents

Limes et alésoirs endodontiques Download PDF

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Publication number
EP1716818A1
EP1716818A1 EP06252240A EP06252240A EP1716818A1 EP 1716818 A1 EP1716818 A1 EP 1716818A1 EP 06252240 A EP06252240 A EP 06252240A EP 06252240 A EP06252240 A EP 06252240A EP 1716818 A1 EP1716818 A1 EP 1716818A1
Authority
EP
European Patent Office
Prior art keywords
file
central core
shank
width
triangular outer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP06252240A
Other languages
German (de)
English (en)
Other versions
EP1716818B1 (fr
Inventor
Giuseppe Cantatore
Arnaldo Castellucci
Elio Vincenzo Giovanni Berutti
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
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Individual
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Application filed by Individual filed Critical Individual
Publication of EP1716818A1 publication Critical patent/EP1716818A1/fr
Application granted granted Critical
Publication of EP1716818B1 publication Critical patent/EP1716818B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C5/00—Filling or capping teeth
    • A61C5/40—Implements for surgical treatment of the roots or nerves of the teeth; Nerve needles; Methods or instruments for medication of the roots
    • A61C5/42—Files for root canals; Handgrips or guiding means therefor

Definitions

  • the present invention relates to the field of endodontic instruments adapted for use in performing root canal therapy on teeth.
  • the files of this invention are characterized by improved lateral as well as torsional flexibility.
  • the crown of a diseased, abscessed or infected tooth is opened so to permit the root canal to be cleaned and then filled.
  • the procedure, after opening the crown is to employ a series of flexible instruments or files which are used to clean out and shape the root canal.
  • the root pulpal material of the tooth is removed. That is, after opening the crown, the endodonist must carefully extract the pulpal material to alleviate and prevent reinfection and at the same time to shape the root canal so as to receive a filler material, such as gutta-percha.
  • the normal procedure is the use of a dental file or, more likely, a series of dental files.
  • Each file is manipulated, that is, rotated and reciprocated in the root canal by the endodonist. This can be done manually or by the insertion of the file within a hand piece by which the file is mechanically rotated with the manipulation of the hand piece being controlled by the endodonist.
  • files of increasingly larger diameter are used in sequence to achieve the desired cleaning and shaping.
  • a filler material which typically comprises a waxy, rubbery compound known as gutta-percha, although other filler materials have been perfected.
  • the invention herein is not concerned with filling the root canal after it is cleaned and prepared, but instead, the present invention is concerned with the configuration of endodontic files having improved lateral and torsional flexibility.
  • Root canals are seldom straight but on the contrary, the typical root canal is non-linear and can be configured in bends and turns. Further, the interior wall of the root canal is usually irregular. For these reasons, dental files are employed not only to remove pulpal material but to shape the wall of the root canal so that it can be more successfully treated by the deposition of filler material. For these reasons the files used to clean a root canal must be highly flexible to enable the endodonist to clean the root canal to the full depth thereof. In addition to being highly flexible, endodontic files are required to have torsional strength and capability to resist cyclic fatigue. For further background information relating to the subject matter of this invention and specifically relating to dental reamer/files reference may be made to the following previously-issued United States patents.
  • a dental file instrument is the subject of this invention which may also be titled a "rearner.” Whether described as a “reamer” or “file,” the function is essentially the same-that is to clean and shape the root canal of a tooth to permit the tooth to receive a filler material.
  • the invention will be described as a file with the understanding that it is inclusive of a reamer.
  • the dental file of this invention has an elongated shank having a proximal end portion, a distal end and an intermediate working portion.
  • the external surface of the shank working portion has three continuous, equally spaced, helical flutes formed into a central core of the shank working portion.
  • the spaced apart helical flutes form therebetween three integral spiral flanges, each of which is, in planes perpendicular to the length of the shaft, shaped in part by a triangular outer portion.
  • the triangular outer portion of each spiraled flange has, in cross sections taken perpendicular to the length of the file, a base width of (A).
  • Each of the triangular portions has an apex that forms a cutting/scraping edge.
  • the triangular outer portion of each spiraled flange is integrally connected to the shaft's central core by a reduced width neck portion having a width (B).
  • each spiraled flange is greater than the width (B) of the connecting neck portion.
  • the triangular outer portion of each spiraled flange is therefore rotationally flexible relative to the shaft's inner core portion and the spiraled helical flutes provide longitudinal flexibility.
  • the improved dental file of this invention is indicated by the numeral 10.
  • the file includes a shank, generally indicated by 12, which includes a proximal portion 14, a distal end 16 and an intermediate working portion 18.
  • proximal portion 14 is a handle 20 that is typically held between the thumb and forefinger of the practitioner by which the file is rotated.
  • At least one helical flute 22 Formed on the working portion 18 of the digital file is at least one helical flute 22. In the preferred embodiment there are a plurality of helical flutes 22. In the illustrations of the invention in Figures 3-7 there are three helical flutes 22A, 22B and 22C. While the number of flutes can vary between one and a higher number, typically the preferred number of flutes is illustrated in Figures 3 through 7, that is, there are three helical flutes. The flutes start at a position that is spaced from handle 20 and extends to distal end 16. In the illustrated arrangement, the shank 12 has a cylindrical portion 24 that partially extends within handle 20.
  • Each of integral flange portions 26A through 26C has adjacent its outer end a flange working portion 30.
  • each flange working portion 30 is of triangular configuration providing planar surfaces 32A and 32B that intersect to form tip 34.
  • Tip 34 defines a spiraled cutting, scraping or abrading edge. That is, edge 34 of each of the flange working portions 30 forms, in a cross-section of each of the flange working portions 18, a tip 34 but this tip forms a spiraled cutting or shaping edge 34 as seen in Figure 2.
  • Each of the flange working portions 30 has a width A as illustrated in Figures 3 through 5.
  • Each flange working portion 30 is connected to the shank central core 28 by a flange neck portion 26.
  • An important aspect of the invention is the provision that the width A of each flange working portion 30 is greater than the width B of the flange neck portion 26.
  • These reduced width neck portions 26A, 26B and 26C permit a degree of flexibility of each flange working portion 30 compared to the central core portion 28.
  • each of the spiral flutes 22A through 22C determines the width B of the neck portion 26.
  • the width B, of each of the neck portions 26A, 26B and 26C is equal, predicated upon the depth of the flutes 22A, 22B and 22C being equal.
  • the width of the neck portions 26 of each of the helical flutes is varied to thereby dramatically vary the rotational flexibility of the working portion of each spiraled flange relative to core portion 28.
  • Each flange working portion 30 may vary in geometrical configuration.
  • each of the flange working portions 30 is substantially similar in its geometrical configuration. That is, the surfaces 32A and 32B of each working portion 30 are substantially the same irrespective of the variation in the flute depth and therefore the variation in the width B and of the neck portions 26A of the three illustrated embodiments.
  • the width A remains substantially equal while the width B varies considerably.
  • flange outer surfaces 32A and 32B meet at an acute angle, that is, less than 90°.
  • Figure 6 shows the arrangement wherein the surfaces 32A and 32B meet at apex 34 at a right angle.
  • Figure 7 shows the embodiment wherein the surfaces 32A and 32B meet at apex 34 forming an obtuse angle, that is, greater than 90°.
  • the flange working portion 30 is defined by an acute angle as in Figures 3, 4 and 5
  • the apex 34 provides a sharper scraping edge so that the file, when rotated in a root canal has a greater tendency to dig into the surface of the wall of the root canal and therefore to cut away or remove portions of the wall as the file is rotated.
  • the surfaces 32A and 32B meet at an obtuse angle as in Figure 7, the cutting action is reduced.
  • the cutting or abrading action of the files as they are rotated is controllable by the design of shape of the flange working portions.
  • Figure 4 illustrates the flexibility of the endodontic file of this invention.
  • one of the flange working portions 30 is shown in dotted outline as it would be slightly deflected when the file is rotated clockwise and the tip or spiral end 34 engages an inwardly protruding irregularity in the root canal (not shown) in which the file is situated.
  • This flexibility decreases the possibility of the file becoming rotationally locked as the file is rotated in the process of cleaning or shaping a root canal.

Landscapes

  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Neurology (AREA)
  • Neurosurgery (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Surgery (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Dentistry (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
  • Dental Preparations (AREA)
  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
EP06252240A 2005-04-27 2006-04-26 Limes et alésoirs endodontiques Not-in-force EP1716818B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US11/115,896 US20060246394A1 (en) 2005-04-27 2005-04-27 Endodontic files having improved lateral and torsional flexibility

Publications (2)

Publication Number Publication Date
EP1716818A1 true EP1716818A1 (fr) 2006-11-02
EP1716818B1 EP1716818B1 (fr) 2009-03-11

Family

ID=36790829

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06252240A Not-in-force EP1716818B1 (fr) 2005-04-27 2006-04-26 Limes et alésoirs endodontiques

Country Status (6)

Country Link
US (1) US20060246394A1 (fr)
EP (1) EP1716818B1 (fr)
JP (1) JP2006305363A (fr)
AT (1) ATE424779T1 (fr)
DE (1) DE602006005536D1 (fr)
ES (1) ES2322291T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017160501A1 (fr) * 2016-03-15 2017-09-21 Essential Dental Systems, Inc. Instruments endodontiques non circulaires

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080153055A1 (en) * 2001-05-30 2008-06-26 Discus Dental, Llc Endodontic Reamer and Method for Manufacturing Endodontic Reamer and Files
US7094055B2 (en) * 2001-05-30 2006-08-22 Steven Senia Endodontic reamer and a method for manufacturing endodontic reamers and files
US7435086B2 (en) * 2005-08-02 2008-10-14 Elio Vincenzo Giovanni Berutti Endodontic tool having reduced torque demands
US20070101827A1 (en) * 2005-11-01 2007-05-10 Quan Nancy N Endodontic Instrument
EP2438884B1 (fr) 2010-10-06 2013-02-13 VDW GmbH Système endodontique
JP7143262B2 (ja) * 2019-08-22 2022-09-28 マニー株式会社 歯科用根管治療器具

Citations (4)

* Cited by examiner, † Cited by third party
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US5762541A (en) * 1991-11-05 1998-06-09 Dentsply International Inc. Endodontic instrument
US6074209A (en) * 1998-10-06 2000-06-13 Tulsa Dental Products Inc. Reduced torque endodontic file
US20040043357A1 (en) * 2002-08-28 2004-03-04 Ormco Corporation Endodontic instrument
US20040229188A1 (en) * 2003-05-13 2004-11-18 Paul Lewis Method for manufacturing endodontic instruments

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US4443193A (en) * 1983-02-08 1984-04-17 Roane James B Endodontic instrument
US4536159A (en) * 1983-02-08 1985-08-20 Roane James B Endodontic instrument
US4934934A (en) * 1988-11-04 1990-06-19 Quality Dental Products, Inc. Dental file/reamer instrument
USRE34439E (en) * 1988-11-04 1993-11-09 Heath Derek E Dental compactor instrument
AU4742490A (en) * 1988-11-18 1990-06-12 Bernard Weissman Dental reamer tool
US5403344A (en) * 1993-07-22 1995-04-04 American Cyanamid Co. Multi-faceted surgical needle
US5380200A (en) * 1993-10-08 1995-01-10 Quality Dental Products, Inc. Endodontic instrument of predetermined flexibility
US5897316A (en) * 1994-04-28 1999-04-27 Buchanan; Leonard Stephen Endodontic treatment system
CH690538A5 (fr) * 1995-03-24 2000-10-13 Maillefer Instr Sa Jeu d'instruments pour l'alésage des canaux radiculaires dentaires.
US6217335B1 (en) * 1996-06-06 2001-04-17 Ultradent Products, Inc. Endodontic systems and methods for the anatomicall, sectional and progressive corono-apical preparation of root canals with minimal apical intrusion
US6390819B2 (en) * 1995-06-06 2002-05-21 Ultradent Products, Inc. Endodontic systems and methods for the anatomical, sectional and progressive corono-apical preparation of root canals with dedicated stainless steel instruments and dedicated nickel/titanium instruments
US6379155B1 (en) * 1996-06-06 2002-04-30 Ultradent Products, Inc. Endodontic systems and methods for the anatomical, sectional and progressive corono-apical preparation of root canals with instruments utilizing stops
WO1997004908A1 (fr) * 1995-07-27 1997-02-13 Mays Ralph C Foret
US6419488B1 (en) * 1995-12-11 2002-07-16 Ormco Corporation Endodontic instrument having a chisel tip
CH691789A5 (fr) * 1995-12-20 2001-10-31 Maillefer Instr Sa Jeu d'instruments pour l'alésage des canaux radiculaires dentaires.
FR2747562B1 (fr) * 1996-04-17 1998-06-05 Micro Mega Int Mfg Sa Alesoir dentaire a section de coupe tangentielle
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FR2755845B1 (fr) * 1996-11-20 1999-06-04 Micro Mega Int Mfg Sa Alesoir dentaire a efficacite de coupe amelioree
US5984679A (en) * 1997-09-26 1999-11-16 Ormco Corporation Method of manufacturing superelastic endodontic files and files made therefrom
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Publication number Priority date Publication date Assignee Title
US5762541A (en) * 1991-11-05 1998-06-09 Dentsply International Inc. Endodontic instrument
US6074209A (en) * 1998-10-06 2000-06-13 Tulsa Dental Products Inc. Reduced torque endodontic file
US20040043357A1 (en) * 2002-08-28 2004-03-04 Ormco Corporation Endodontic instrument
US20040229188A1 (en) * 2003-05-13 2004-11-18 Paul Lewis Method for manufacturing endodontic instruments

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017160501A1 (fr) * 2016-03-15 2017-09-21 Essential Dental Systems, Inc. Instruments endodontiques non circulaires
US10561475B2 (en) 2016-03-15 2020-02-18 Essential Dental Systems, Inc. Non-circular endodontic instruments

Also Published As

Publication number Publication date
DE602006005536D1 (de) 2009-04-23
JP2006305363A (ja) 2006-11-09
US20060246394A1 (en) 2006-11-02
ES2322291T3 (es) 2009-06-18
ATE424779T1 (de) 2009-03-15
EP1716818B1 (fr) 2009-03-11

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